402578 has 16 divisors (see below), whose sum is σ = 682560. Its totient is φ = 176400.

The previous prime is 402559. The next prime is 402581. The reversal of 402578 is 875204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323 + ... + 953.

It is an arithmetic number, because the mean of its divisors is an integer number (42660).

2⁴⁰²⁵⁷⁸ is an apocalyptic number.

402578 is a deficient number, since it is larger than the sum of its proper divisors (279982).

402578 is a wasteful number, since it uses less digits than its factorization.

402578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 402578 is about 634.4903466563. The cubic root of 402578 is about 73.8385816777.

The spelling of 402578 in words is "four hundred two thousand, five hundred seventy-eight".